Your mind is fine. Your boyfriend is a mess. It will hurt you less to break up with him and have no contact with him.

Friendzone him, and have no contact for six weeks. Block him. In those six weeks, since you aren't reeling from the pain of constant rejection, you will begin to feel more feelings. You will probably feel anger and sorrow. But you will also feel glad you aren't being hurt.

Don't waste more of your life on this guy.